It would be nice if service/utility providers treated the situation where one party owes the other money the same way, irrespective of who owes who.
Even better would be billing me for the amount I actually owe. If that means making sure that the meter outside my front door is actually connected up to my house then so be it. And if estimates* have to be used I think that estimating* that I used power in the months of April and May at 400 times the rate I used it between October and March is perhaps a little suspect.
*I’m entirely comfortable with either of these words in this situation – also just to clarify I know you can avoid estimated bills by providing readings. Which is why I provided readings.